Agreed about xp distribution: 2 of my party members levelled up while the other 2 are like 100 to 200++ behind.
Also, I don't like how the fights suddenly got very difficult while the ones where Sebille was, were very easy. The balance is very out-of-whack and some of the skills barely do anything! Worse, there's too much dependency on armour and all the characters have got no natural armour at all! I'm not going to reload just to get the chance to win a fight: if the combat is about tactics, then let us be rewarded for planning/observations/skill usage and not complete trial and error.